Ok, I’ve found a suitable box.
Total weight will be approx 2.6kg. Size is 55 x 35 x 11cm.
Shipping costs vary depending on what service you need – e.g. next day, 2 days, 3 days etc.
(UPS Next Day for instance is £10.87 for a parcel this size & weight – insurance is another £3.90.)
K95 keyboard is £85.
Shipping & insurance would be added at cost.